I figure looking from the inlet port side from the top of the cylinder: 1 CW, 2 CCW 3 CW 4 CCW. But that's just a slightly educated guess that most of the charge goes in the backside of the valve and will turn around as it encounters the cylinder wall.
I suppose an injector fired at the valve would have to help somewhat with charge robbing and maybe firing cylinders 1 and 4? slightly later.
It was an idea I had some time ago, swap the exhaust and inlet ports, so you have 3 inlet ports an 2 exhaust ports, cylinders 2 and 3 then share the middle port but are separated so charge robbing would be minimal. The exhaust might not be optimal however... You would have a charge go out the port immediately followed by it's neighbour which might result in some scavenging happening? You would need a pretty different camshaft though.
_________________ --- Roads need more corners A Deluxe(CG13DE), 2 Clubbies(998 and 1275) and 2 Morris 1100Ss
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